+3: 0.46723
Dots counting.
Deciding whether the left or the right side contained more dots indicating by pressing one of two buttons with the index or the middle finger of their right hand.
WOEXP: 82.
K. Jordan; H. J. Heinze; K. Lutz; M. Kanowski; L. Jancke. Cortical activations during the mental rotation of different visual objects.
NeuroImage13(1):143-52, 2001.
PMID: 11133317.
DOI: 10.1006/nimg.2000.0677.
WOBIB: 25.